(Al_2O_3+TiB_2)/ZL202复合材料的制备和力学性能  

Fabrication and mechanical properties of (Al_2O_3+TiB_2)/ZL202 composites

作　　者：赵德刚[1] 刘相法[1] 边秀房[1] 刘相俊[1] 张永昌 

机构地区：[1]山东大学材料液态结构及其遗传性教育部重点实验室,济南250061 [2]临沂恒源热电有限公司,临沂276000

出　　处：《中国有色金属学报》2004年第10期1723-1728,共6页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(50171037)

摘　　要：采用原位熔体反应合成法制备了(Al2O3+TiB2)/ZL202复合材料。用电子探针对复合材料的微观组织进行观察。结果表明:增强相TiB2颗粒主要分布于晶界上,与CuAl2相交织在一起,尺寸在1μm左右,呈现圆球形,Al2O3颗粒约在3μm左右,呈现规则的颗粒或圆球状,且彼此分离,界面干净。对铸态复合材料室温抗拉强度和硬度的测试发现,两相颗粒增强的复合材料都较单一颗粒增强复合材料要高。经过T6处理后,(Al2O3+TiB2)/ZL202复合材料的抗拉强度由221.0MPa提高至339.6MPa,提高幅度达53.67%,其延伸率降低至2.60%。Fabrication technology of (Al_2O_3+TiB_2)/ZL202 composites by in-situ reaction synthesis process was fabricated. The electron probe microanalyses of the composites reveal that TiB_2 particles distribute along the grain boundaries, which interweave with CuAl_2 phases. TiB_2 particle is about 1 μm in size, with nearly spherical form. Al_2O_3 particles are about 3 μm in size, which are separated and its interfaces are clean. From the results of hardness tests and tensile experiments at room temperature, it is found that the hardness of the composites reinforced cooperatively by both TiB_2 and Al_2O_3 is obviously higher than that of composites reinforced by one kind of particle. After T6 treatment, the tensile strength of (Al_2O_3+TiB_2)/ZL202 composite increases from 221.0 MPa to 339.6 MPa, which is raised by 53.67%. The ductility of composites is 2.60%.

关 键 词：原位合成 金属基复合材料 力学性能 TIB2 AL2O3 颗粒 

分 类 号：TB331[一般工业技术—材料科学与工程]